Steam-engine



UNITED STATES PATENT OFFICE.

SETH H. WHITMORE', OF CINCINNATI, OHIO.

STEAM-ENGINE.

Specicaton of Letters Patent No. `31,920, dated April 2, 1861.

To all whom it may concern:

Be it known that I, SETH H. VVHITMORE, of Cincinnati, Hamilton county,Ohio, have invented certain new and useful Improvements inSteam-Engines, of which the following is a full, clear, and exactdescription, reference being had to the accompanying drawings, in whichlike characters represent like parts of the engine.

My improvements relate, first, to the apparatus for admitting andshutting off steam and regulating the supply thereof in proportion tothe wants of the engine; second, to the construction of the valve orvalve openings as hereinafter described.

The lirst improvement consists of the combination of two hollow throatedoscillating valves (placed at opposite ends of the steam cylinder) witheach other, by means of a connecting rod attached to the valve crankswhen the rod is operated by a link which receives its motion in theordinary way.

In the drawings l, 1, represent the hollow throated oscillating valves;2, 2, the steam passages; 3, 3, the exhaust passages; 4, t, the

valve stems; 5, 5, the steam chamber; 6, 6, the valve cranks; 7, 7, thewrists atthe eX- tremity of the valve cranks, to which the connectingrod B is attached, thus connecting and combining the valves l, l; 8, 8,the rods which operate the link L, in the ordinary way, receiving theirmotion from separate eccentrics, or in any usual mode.

10, is the pin upon the rod B, upon which the lin VL moves by means ofthe slot 9. It is manifest that by moving the link up or down upon thepin l0, the Vleverage would be lengthened or shortened, and the valveswould cut off earlier or later in the stroke.

Thel position of the link upon the pin l0, and therefore in relation tothe connecting rod B, may be varied by hand, or, the link may be broughtdirectly under the control of the governor.

The second improvement, consists in providing the oscillating valves l,l, with a V- shaped opening, as shown at 2 in Fig. 3.

This opening may be produced by giving a V shape, either to the valvesl, l, or to the steam passages 2, 2. The object of such an opening is toprevent the cylinder from overcharging when the crank is passing itscenter, as one end or corner of the valve opening takes the steam,before the valve becomes fully opened throughout its entire length.

Having thus fully described my improvementsgwhat I claim therein as newand desire to secure by Letters Patent, is:

l. The combination of two hollow throated oscillating valves with eachother, when operated by a link motion, substantially as described.

2. The application of a governor to a link when used throatedoscillating valves,.for the purpose of effecting a variable cut-off,substantially as described.

3. The V-shaped opening in the valve or valve seat of a hollow throatedoscillating valve, for the purpose of admitting steam before the valveis opened throughout its entire length, substantially as described.

In testimony whereof I have hereunto set my hand.

VSETH H. VHITMORE. W'itnesses SAuL. S. FISHER,

IVM. T. RICHARDSON.

in combination with hollow

